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C++

delete

The delete operator calls the destructor of the given argument, and returns memory allocated by new back to the heap.After calling delete the memory object pointed to is invalid and should no longer be used.

Syntax:

delete variable;

Example:

int *p_var = nullptr;  // new pointer declared
p_var = new int;       // memory dynamically allocated
 
/* .......
other code
........*/
 
delete p_var;          // memory freed up
p_var = nullptr;

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